After following workaround suggested by Xnyper I hit bug #536981 Dirty, unreliable fix was to remount the partition to /cdrom right after hitting the 'install' button of the last step of the installer:
sudo mount -t iso9660 -o ro,noatime /dev/sdaX /cdrom/ -- usb startup disk failed to unmount /cdrom when change partition tables https://bugs.launchpad.net/bugs/292493 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
